for me, cheats just for completing "the hidden" part that i think tooooo hard to finish, just in case when i played FF IX PSOne,collecting all of the cards are almost imposibble, but i am cheating after i finish the game, so in the second chance playing, cheating is allowed lol

To be blunt, cheats are made for those who are of insufficient patience or are unable to complete the game for other reasons. From my point of view, game guides are in some ways considered cheats because they tell you how to finish the game without actually figuring out yourself. I'm sure by this definition, everyone has used cheats at some point in their lives.

Some top reasons for using cheats include:

1) I don't like to grind.
2) I keep dying.
3) Everyone else uses cheats.
4) I paid for the game, and I can do whatever I want.
5) I don't have time to play the game.
6) I'm just stupid.
7) I've already finished it, so what does it matter.
8) I just want to see the ending.
9) I just want to kick some ass.
10) The game allows it, therefore I'm not cheating.
11) I want to explore the game fully.
12) None of your business.

From the game maker's perspective, their top reasons to have cheats in the game include:

1) Some hacker will end up cracking it anyways.
2) Our quality assurance team sucks so this will make up for the bugs.
3) We know our players would want it.
4) They're for debugging, but we forgot to take it out.
5) Someone cracked our backdoor codes.

w8 in all games general or like games systems? but id say cheats cause if u beat the game once u dont need to go through the whole thing to get to the beast part of the game, to simply get to the part u were before ur memory of ur game got mess up, or to beat the game to find out the story line to it, those are really the only reason u need cheats for.

Your question is a hard one to answer. It depends on the kinds of cheats you are wanting to ask about I suppose. If you mean why is it that the shop keep in this rpg has a bug where if you press the buttons just so you can milk him for infinite money or the rather famous w-items cheat of FF7 then I think its as much a bug that just wasn't caught during play testing as it is anything. Why not phase them out in more current games as that wasn't possible to do so after release in the past? Well they do but honestly some things just slip through the cracks or they inadvertently make it worse such as making it possibly easier to dupe in Oblivion than it originally was. These western rpgs in particular are riddled with bugs that can work for you like that due to their opened natures I suppose. (Remembers when his character some how phased through the ground on KOTR 2 and lost three hours of work.)

If you are asking about things like the famous Konami code however then it is mostly as said before and something that was coded in so the playtesters could actually play through the game and deliberately screw up to thoroughly test it. Why keep using the same code over and over if the players have caught on? Well for one it makes you that much more famous plus you don't have to reteach your testers every game what the cheat code is. Why not code it out you might ask? Well who would have expected the average player to try that sequence of movements in the first place?

Then there are some that are put in there just for the lulz of both the developers and players. GTA's little use your cell phone to get a helicopter come to mind. I mean its a sandbox game so the point is to play around so why not give the player some ridiculous stuff at the drop of a hat? There has to be some consolation to putting up with that annoying cousin calling you every minute.

Lastly we have the much hated game shark/game genie/pro action replay. Honestly this is just a hack tool and if you complain about this I suppose you really don't bother downloading alternate skins or mods for your computer games either. Personally I'll admit I've used all three items but mostly after I've already beaten the game. Why would someone do this? Well I don't know about you but after beating FFTactics for the PS1, who wouldn't want to see what it was like to play as a Dark Knight since that wasn't an option then? How about getting those items that are in the game but unavailable the creators decided to simply not give a way to get them rather than deleting it from the data files as dlc didn't exist at the time?

I think cheats were made because sometimes, getting the power-ups or secrets are just too damn tedious. I mean we work so hard in some of these games you should have lost some weight with the time we put in.

Cheating n00b is somebody who cheats cause they suck and can't defeat a certain boss or a certain level or whatever so they get angry and use cheats I hate this type of cheating. Usually includes stuff like infinite health or lives.

Time saving cheating is are cheats like unlock all characters or all levels they save time although I only use them when I have data loss some people use them to skip content which I think is bad. for example I unlocked all the levels on half life 2 when I installed it on my computer using cheats because I had beaten it before. also can be used in games that you can't save in.

Bonus cheating is cheating which you modify things like gravity or like the goldeneye cheats, dk mode paintball mode no radar ect. they basically add more options. any unreachable thing is in the category anything you can't do without cheats.(but aren't used in a way to progress through the game)

There are no problem with using cheats, but do not go around claiming your skillfulness if you indeed used some form of cheat to accomplish the victory. I believed when third party cheating devices such as gameshark appeared, many cheated and shamelessly bragged themselves, causing anger to the players who play the game properly. In particularly, in built cheats aren't exactly cheating, because the programmers have left it there, so taking advantage of any loopholes within the game isn't cheating. Usage of third party software is however a clear cut cheater's act, such cheating methods have no justification nor the rights to brag